<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			/* 0 0 1 0 */
			.dv {
				color: orange;
			}

			/* 0 0 0 1 */
			div {
				color: red;
			}

			/* 0 1 0 0 */
			#d1 {
				color: green;
			}
		</style>
	</head>
	<body>
		<div class="dv" id="d1">css优先级</div>
	</body>
</html>
